Carbureter.



A. S. BERGEN.

CAHBURTER.

APPLICATION man Nov. 25. |912.

1,212,887'. Patented Jan.16,1917 I 2 surely-sain l.

numrmms l l .[30 @Memo A. S. BERGEN.

v cARBuRETEnJ APPLICATION FILED NOV. 25. |912.

1 ,2 1 2,887. y Patented Jan- 16, 191,7

in which,-

BRAM SCHENCK BERGEN, OF HUNTINGTON, NEW YORK.

CARB URE/FER.

T o alt whom it may camerali Be it known that I, ABRAM Scannen BERGEN, a citizen of the United. States, and a resident of Huntington, in the county et' Suil'olk and State of New Yorlr, have invented new and useful Improvements in Carbureters, of which the following is a specification.

y invention relates to improvements in carbureters of the automatic type, and the objects of my invention are to provide a simple and efiicient carburetor which will provide substantially a constant mixture of fuel and air through its entirey range; to provide ready .means for varying the ratio between the quantity of fuel and the quan tity Vof air, which ratio, when established, shall remain substantially constant throughout the range of the carbureter; to provide means whereby the carbureter shall operate under a substantially constant vacuum; to provide means for automatically varying the eifective area of the air and iinel intake ports to correspond with the demand for mixture upon the lcarburetor,jk-to provide meansfswhereby the float feed chamber may rbe adjusted to any desired position with to provide ve in the be readily relation to the mixing chamber; means' whereby the throttle val float hamber and its seatmay removed; and to provide means for acceler.V

atingi-the velocity of a-portion of the air admitted to the mixing chamber for the purpose of properly pulverizing the liquid uel..

The other objects are pointed out in the specification and claims.

The essential features of my invention are pointed out in the specilication and in the appended claims.

I attain these objects by the mechanism illustrated in the accompanying drawings,

F' re 1 is a .erspective view of my carburdtgeli; Fig. Qis a pla-n view of the bottom' of my invention; Fig. 3 is a sectional elevation on the linear-w of Fig. 2; Fig. 4

is a sectional view on the line t-t of Fig. 3;

and Fi ..5 is a. sectional view of a modification o` my invention, end of the mixing chamber and piston valve. 'Similar numerals refer to similar parts throughout the several views.

My carburetor is provided with a lioat feed chamberV 1, which is provided with a. oat 3, having a passage. 3 therethrough,

Specification of Letters Patent.

Application filed November 0f;

form and is mounted. upon a showing -the lower .this directiontendingV to uncover the ail:1

` By means of the cable be rotated in the opp Patented Jan. 16, 1917.

1912. Serial No. 733,311?.

through 'which the stem 5 of the hall valve i passa-s. lTo the upper en d of the stem .5 is attached an adjustable stop 5. l

is a removable cover, in which is the usual opening; 2 for the admission of air. tothe chamber. A removable guide` 6 is secured in the bottom of the float feed chamher 1, which is'provicled with a valve seat 7, and in the lower end of the guide 6 is secured pipe 8, by which liquid fuel', such as gasolene, is supplied to the chamber 1 the flow of fuel being eut o when thejuel has risen to a sutiicient height in the chamber 1 to force the valve 4 against the Se'at 7. The ,guide 6 being removable, the valve 4 may he conveniently ground into its seat by removing' the guide 6 and the.fioat 3 and valve 4 from the chamber 1. The chamber 1 is also pn,jided with a drain-cock 9 in order thatl any water or'other foreign sub- Stance which may accumulate in the bottom of the carhureter may be drawn off. 'A assage 10, located at a distance above the ottom ofthe chamber 1 connects with a. spray nozzle 11, which iscentrall located in the mixing chamber 12, which 1s cylindrical in base 13, which is shown as 'cast integrallyrwith the chamber 1. The mixing chamber 12 is secured tothe base 13 by studs 133,'which pass through a collar 13h and the base 13 and the nuts 13 and thesplit ring 13d, which is sprung into a groove 13e near the lower end of the cylinder 12. The base 13 i`s provided with air intake openings 14 and adisk 15 with openings 1G is secured in place against the lower face of the base 13 by a nut 17. The disk 15 acts as ashutter which may-be rotated for the purpose of opening and closing the air ports in the base 13. This disk is provided with an arm 18 and the stud 19, which may be secured in any one of` the series of the openings in the arm 20. 'The base 13 is also provided with a .slot 20, which registers with the stud4 19, and by saV y.

loo

adjusting the stud 19 in the openingsin the arm 20 the movement of the arm 18 and the rotationo the disk may be limited.

In order to maintain the disk 15 in the desired position, -I have provided a spring 21, which tends limit ofits movement in the slot 20 direction of the arrow, the movement 4in ports 1n the base 13. 22,;the shutter may to force the stud 19 to theAv in the4 ls'ition shown in Fig, 3.

site direction so as to partially or wholly close the air ports 14:. This is for the purpose of enabling the operatorv to enrich the mixture -with fuel just before the engine is stopped in order that it may bereadily started from the spark and without cranking. The cylindrical chamber 12 is provided with a number of air intake openings 23, preferably rectangular in form, the total capacity of such air intake open ings being greater than the capacity of the youtlet neck 24 of the chamber 12, which is provided with a flange 25, to be secured to the intake pipe of an internal combustion engine.

.26 is a butteriiy throttle valve of the usual itype. In the chamber 12 is mounted a piston valve 27, whichnormally rests in the po- The valve 27 is provided with ports 28, which, as shown in the drawing, are four in' number, whereas the ports in the chamber are seven 'in number. This enables me to dispense with any guide for piston valvu27, as when the piston is raised it maybe neta-ted in the cylinder beib being equidi'sta'nt from each other and of equal width and form, and the partition walls in, one member beingjof awidth at least equal to one 0i the equal divisions of the said" circumference.

The number of 'poi'ts in one member must be greater than the number of ports in the other member,

' dividing and when the number of ports in one member is a multi4 le ofthe number of ports in the other mem' r, the width of the walls between the orts ,in this -member having the lesser num r of ports must be at least giel to that portion of the circumference w ich is eual to the: divisions obtained by e; circumference into as many equal parts as the number of orts in the member having the largest num r of orts.

The piston is also provided with a ownwardly flaring of the airl a mitted through the'ports 16 must pass in close proximity to the spray nozzle soas toi-cause the. air which passes by the spray nozzle, even when but'a small amount of mixture is demanded from the carburetor, to travel past the spray nozzle at a suliicient speed to properly pulverize the liquid fuel. opening is determined by the tapered needle tube 29, through which allv The area of the fuel' intake' valve 30, which extends down into the 'spray nozzle. The needle 30 is mounted in a. yoke 3l, supported on the piston 27, and is adjustable as to height by means of the nuts 32 and 33. The needle 3() is so tapered that collar 35, which may be rotated about the 8( chamber 12 so as to increase or diminish the width of the air openings 23, thus providing means for adjusting the amount of air which is admitted to the chamber 12 as against the amount of fuel which is submitted to it S5 through the spray, nozzle 11. lVhen the tubular collar 35 has been properly adjusted it may be secured in position by the screw 35.

I have also provided at the upper end of .30

the mixi'ng chamber a water jacket 38 of the usual construction, to which heated water from the water jacket of the engine is admitted through the pipe 39 Vand-discharged through the pipe 40.

my invention, in which a stationary hourglassfshaped tube-36 is mounted on.the base 13 so as tos'urround the spray 'nozzle o .In Fig.A 5, I have. shown a modification of 1 11. The upper end of thes ray nozzle beor ing located in the constricte portion of the tube 36. Mounted in' the central opening l through the piston valve 27 is a downwardl flaring tube 37, the lower end of which inta. l

positions of the valve 27 will surround the' upper end of the tube 36. -By this construction, I am able to lead the 'air which enters through the openings in thebase 13 past the spray nozzle 'at the highest possible speed so as to properly pulverize the liquid L10 fuel, even when but a small demandy for mixture is being made upon the earbureter. The tubes 36 and 37 are so constructed as to4 be at all times out of contact, thereby avoiding any danger of the-valve 27 bindin and 115` `failing toact through contact of the tu 37 with the tube 36, and rendering it possible' to always maintain the upper end of the spraynozzle in the most constricted portion contact'with the liquid fuel at the maximum. air velocity.

In the operation of carburetor, I prem fer to so .adjust the'needle valve 30 and the uantity of mixture 'of the tube 36, where the inflowing air will 120? the adjustment of the stud' 19 the mixture "0 reeultin flexibility of the motor increased may be readil .,dusted for all speeds and loads by the of the collar 85. "Inpractice, I have found that these adjustments are readily and accurately made andthatun'der all conditions the air travel past the spray nozzle is suilicient to properly pulverize the fuel, in greater wer and a very considerable reduction in e amount of fuel consumed to produce a given result. By the construction shown. the cylinder 12 may be rotated on the base 13 to any desired position, so that when the carbureter is atrus ' tonl valve is ele ated, an air nozzle centrally mounted in said piston valve and discharging into said mixing chamber, said a1rnoz zle having air admission ports 1n communication therewith, a spray nozzle surrounded by and discharging into said air nozzle, and

va needle valve carried by said piston valve and oXerating in the spray nozzle.

2. carburetor comprising in combination, a chamber having air rts in its wall, a hollow piston valve slidab y fitting the inner `side of the Ichamber and having air ports variably registering with those in the wall of the latter, said hollow iston valve carrying therewith an internal y arranged air nozzlein communication with the outer air, a spray nozzle in communication with the fuel supply and extending into saidi air nozzle,and a needle valve carried by the 'piston valve andoperating in the spray the bottom air ports and presenting a pisn ton surface over said bottom air ports, a spray nozzle extending into the air nozzle, and a Vneedle valve carried by the piston valve and operating in the spray nozzle.

4. A carbureter comprising in combination a float feed chamber rovided with a base, a cylindrical mixing c amber provided with a flange at its upper end, adapted to be sewn-ed to the intake pipe of an explosive engine, a circumferential Vgroove near the lower end of said mixing chamber, a divided ring adapted to fit into said groove, a collar adapted to fit around said mixing chamber and contact with said divided ring .when inserted in saidgroove, and means for securiiip: said collar to said hase.

Signed at New York city in the county of New York and State of New York, this 14th day of November, A. D. 1912.

ABRAM sci-IENCK BERGEN.

E. Hawluxs. 

